She's all grown up! Dakota Fanning sports a polished look in leather trousers as she heads out of LAX in style

She opts to dress down on her days off, with her appearance often bordering on scruffy.

But former child star Dakota Fanning sported a far more polished, grown-up look on Thursday.

The 19-year-old wore olive-green leather trousers and a white blouse as she arrived at Los Angeles International Airport to catch a flight.

All grown up: Dakota Fanning sported a more polished look in leather trousers and a white blouse as she arrived at LAX on Thursday to catch a flight

The Twilight star looked the height of chic, adding a black leather jacket and black booties as she sauntered through the airport.

Dakota wore her blonde hair loose and straight over her shoulders and shielded her eyes with retro sunglasses.

She appeared to be wearing no makeup, adding a pop of colour with a blue handbag.

Smartening up: The Twilight star looked the height of chic, adding a black leather jackets and black booties as she sauntered through the airport

The Twilight actress recently appeared to debut a new romance as she stepped out hand-in-hand with an attractive man – as she takes gradual steps towards being seen as less of a child star.

The couple, who were first seen together at the end of May, seemed very comfortable together as they strolled around New York.

The relationship is a big step for Dakota, as she previously revealed that she’s not really interested in the opposite sex because she doesn’t like dating.

Just like us: Dakota was later seen rifling through her bag as she waited for her flight

She explained to Glamour magazine earlier this year: 'I have a weird vision of relationships because my parents have known each other since second grade, and they got married right out of college.

‘I’ve always thought that’s what it’s supposed to be like, and if it’s not, then I don’t want to waste my time on it.

'Even when I was 14, I was like, "I’m not gonna marry this person. What’s the point of doing it?" It’s not me being naive. I just know what it’s supposed to be like.

'And I think until I feel that, I cannot be bothered.'

Dakota can next be seen as a wealthy financial eco-terrorist in the thriller film Night Moves, which also stars Jesse Eisenberg and Peter Sarsgaard and premieres at the Venice Film Festival on August 31.

Pleased to meet you: Dakota Fanning is in high spirits shortly after touching down at Marco Polo Airport in Venice

Touchdown: Dakota arrives in Venice ahead of her appearance at the 70th International Venice Film Festival

Lady in leather: Dakota wears leather trousers for her arrival in Venice on Friday